Yeah, I've thought about clocking it externally, but I don't want to reprogram the chip. I was looking for a way to debug a finished circuit if 'bit timing' was in question. My solution (unless this will prematurely destroy the PIC) is to have a three position header that will either parallel a 0.01uf cap across the 330pf with a 10Meg resistor, or when moved on the other two pins, remove the 0.01uf from the circuit and parallel the 10Meg with a 100K. Now it is slow enough for me to watch the LED's without having to reprogram the chip (which would be a problem later with OTP Pics). I'm just wondering if the 0.01uf will exceed the Pics internal transistor's current rating during switching. Dave